Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634242
Y. Izdebskaya
With an emphasis on experimental observations, we review the state of the art in the area of optical spatial solitons in unbiased nematic liquid crystals, outlining their basic and applied features and discussing recent results, including soliton interaction with curved surfaces and observation of dynamical instability of two counterpropagating solitons.
{"title":"Nonlocal interactions of solitons in bias-free nematic liquid crystals","authors":"Y. Izdebskaya","doi":"10.1109/CAOL.2010.5634242","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634242","url":null,"abstract":"With an emphasis on experimental observations, we review the state of the art in the area of optical spatial solitons in unbiased nematic liquid crystals, outlining their basic and applied features and discussing recent results, including soliton interaction with curved surfaces and observation of dynamical instability of two counterpropagating solitons.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115173222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634258
V. Volostnikov, S. Kotova, O. Moiseev, A. Volkov, E. Vorontsov, D. M. Yakunenkova
Of a high interest now are the light fields with spatially inhomogeneous polarization state. These fields give new possibilities for many aspects of optical science and engineering. We consider a new effective method for the synthesis of light fields with predetermined polarization structure by means of specific diffractive optical element (DOE).
{"title":"Light fields of complex polarization structure","authors":"V. Volostnikov, S. Kotova, O. Moiseev, A. Volkov, E. Vorontsov, D. M. Yakunenkova","doi":"10.1109/CAOL.2010.5634258","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634258","url":null,"abstract":"Of a high interest now are the light fields with spatially inhomogeneous polarization state. These fields give new possibilities for many aspects of optical science and engineering. We consider a new effective method for the synthesis of light fields with predetermined polarization structure by means of specific diffractive optical element (DOE).","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114082820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634187
V. K. Kiseliov, V. Radionov
A technique for modelling the shape of the radiation pulse-pumped THz-laser is presented. The initial data to be used for modelling are as follows: the size and the shape of a discharge-current pulse; discharge current-dependent radiated power; the dependence of radiated power upon the tuning control of a resonator at different pumping currents. The application of the above technique makes it possible to produce pulses of required shape and to select laser peak-efficiency operating conditions.
{"title":"Modelling of THz-laser radiation pulse shape","authors":"V. K. Kiseliov, V. Radionov","doi":"10.1109/CAOL.2010.5634187","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634187","url":null,"abstract":"A technique for modelling the shape of the radiation pulse-pumped THz-laser is presented. The initial data to be used for modelling are as follows: the size and the shape of a discharge-current pulse; discharge current-dependent radiated power; the dependence of radiated power upon the tuning control of a resonator at different pumping currents. The application of the above technique makes it possible to produce pulses of required shape and to select laser peak-efficiency operating conditions.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126527410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634204
E. Lutsenko, V. N. Pavlovskii, A. Danilchyk, M. Rzheutski, A. G. Vainilovich, V. Z. Zubialevich, A. Muravitskaya, G. P. Yablonskii
Overheating temperature of active region of LEDs made of Bridgelux chips was determined using long-wavelength shift of the EL spectra as well as the voltage reduction at constant current. It was shown that direct liquid active cooling of LED chip reduces drastically its thermal resistance that is promising for pumping of laser active media.
{"title":"Determination of active region overheating temperature of GaN-based light emitting diodes promising for laser media pumping","authors":"E. Lutsenko, V. N. Pavlovskii, A. Danilchyk, M. Rzheutski, A. G. Vainilovich, V. Z. Zubialevich, A. Muravitskaya, G. P. Yablonskii","doi":"10.1109/CAOL.2010.5634204","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634204","url":null,"abstract":"Overheating temperature of active region of LEDs made of Bridgelux chips was determined using long-wavelength shift of the EL spectra as well as the voltage reduction at constant current. It was shown that direct liquid active cooling of LED chip reduces drastically its thermal resistance that is promising for pumping of laser active media.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131525498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634259
A. Kudryashov, V. Samarkin, A. Alexandrov, J. Sheldakova, V. Zavalova
In this paper we discuss the ability of Shack-Hartmann wavefront sensor to be used in the closed loop adaptive system. For sure we do not discuss the possibility of wavefront sensor to measure aberrations of laser beam. But at the same time we consider Shack-Hartmann wavefront sensor to be not the best device in any adaptive optical system.
{"title":"Shack-Hartmann wavefront sensor - advantages and disadvantages","authors":"A. Kudryashov, V. Samarkin, A. Alexandrov, J. Sheldakova, V. Zavalova","doi":"10.1109/CAOL.2010.5634259","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634259","url":null,"abstract":"In this paper we discuss the ability of Shack-Hartmann wavefront sensor to be used in the closed loop adaptive system. For sure we do not discuss the possibility of wavefront sensor to measure aberrations of laser beam. But at the same time we consider Shack-Hartmann wavefront sensor to be not the best device in any adaptive optical system.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"7 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132005946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634270
E. Glushko
A pneumatic optical medium (POM) sensitive to pressure and temperature due to gaseous voids inside is studied theoretically. The properties of glass, quartz and mica made POM in infrared and visual regions are analyzed. The Kerr type nonlinearity is predicted. Multiscale regimes of pressure and temperature indication are discussed.
{"title":"Pneumatic photonic crystals: Properties and multiscale indication of pressure","authors":"E. Glushko","doi":"10.1109/CAOL.2010.5634270","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634270","url":null,"abstract":"A pneumatic optical medium (POM) sensitive to pressure and temperature due to gaseous voids inside is studied theoretically. The properties of glass, quartz and mica made POM in infrared and visual regions are analyzed. The Kerr type nonlinearity is predicted. Multiscale regimes of pressure and temperature indication are discussed.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122963786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634276
Y. Kivshar
We discuss tunability and nonlinear properties of metamaterials operating at microwave and optical frequencies. We also study the fundamental nonlinear effects in metal-dielectric waveguides supporting surface plasmon polaritons, and discuss nanofocusing of a plasmon beam and soliton formation in a tapered waveguide in the presence of losses.
{"title":"Tunable nonlinear metamaterials and plasmon nanofocusing","authors":"Y. Kivshar","doi":"10.1109/CAOL.2010.5634276","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634276","url":null,"abstract":"We discuss tunability and nonlinear properties of metamaterials operating at microwave and optical frequencies. We also study the fundamental nonlinear effects in metal-dielectric waveguides supporting surface plasmon polaritons, and discuss nanofocusing of a plasmon beam and soliton formation in a tapered waveguide in the presence of losses.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127947852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634261
N. N. Elkin, A. Napartovich, D. V. Vysotsky
Bidirectional beam propagation method is modified to describe wave field interference in laser cavity with multiple quantum wells. Properties of optical modes are found numerically for cylindrical vertical cavity surface emitting laser with above threshold e-beam pumping and external mirror. The stability limits of single-mode operation are determined.
{"title":"3D model of vertical cavity surface emitting laser with resonant array of quantum wells and external mirror","authors":"N. N. Elkin, A. Napartovich, D. V. Vysotsky","doi":"10.1109/CAOL.2010.5634261","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634261","url":null,"abstract":"Bidirectional beam propagation method is modified to describe wave field interference in laser cavity with multiple quantum wells. Properties of optical modes are found numerically for cylindrical vertical cavity surface emitting laser with above threshold e-beam pumping and external mirror. The stability limits of single-mode operation are determined.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121219312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634256
A. Maimistov
Propagation of the fundamental and third harmonic solitary waves in medium characterized by negative refraction index at the frequency of fundamental wave and by positive refractive index at the third harmonic frequency and simultons formation are considered. Gap soliton in a novel kind of nonlinear coupler with one channel or both channels fabricated from nonlinear medium having negative refraction index is found.
{"title":"Nonlinear solitary waves in positive-negative refractive media","authors":"A. Maimistov","doi":"10.1109/CAOL.2010.5634256","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634256","url":null,"abstract":"Propagation of the fundamental and third harmonic solitary waves in medium characterized by negative refraction index at the frequency of fundamental wave and by positive refractive index at the third harmonic frequency and simultons formation are considered. Gap soliton in a novel kind of nonlinear coupler with one channel or both channels fabricated from nonlinear medium having negative refraction index is found.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128813806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-11-11DOI: 10.1109/CAOL.2010.5634262
A. Negriyko, R. A. Malitskiy, V. M. Khodakovskiy, V. Romanenko, I. V. Matsnev, L. Yatsenko
In a three-level lambda system, a destructive interference between excitation pathways at laser excitation can provide the resonant reduction of fluorescence and absorption (“dark resonance”). The dark resonances in rubidium vapor excited by a femtosecond laser or laser with frequency shifted feedback have been studied theoretically and experimentally.
{"title":"Dark resonances in rubidium atoms excited by optical comb","authors":"A. Negriyko, R. A. Malitskiy, V. M. Khodakovskiy, V. Romanenko, I. V. Matsnev, L. Yatsenko","doi":"10.1109/CAOL.2010.5634262","DOIUrl":"https://doi.org/10.1109/CAOL.2010.5634262","url":null,"abstract":"In a three-level lambda system, a destructive interference between excitation pathways at laser excitation can provide the resonant reduction of fluorescence and absorption (“dark resonance”). The dark resonances in rubidium vapor excited by a femtosecond laser or laser with frequency shifted feedback have been studied theoretically and experimentally.","PeriodicalId":254986,"journal":{"name":"2010 International Conference on Advanced Optoelectronics and Lasers","volume":"302 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116988694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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